3月中旬前后,当地温达6～8℃时,葡萄根系开始活动,此时葡萄枝蔓上如果有伤口,树液就会从伤口处流出,造成“伤流”。伤流过多对葡萄生长不利,如不加以控制,会使葡萄的树液大量流失,营养损失导致树势衰弱, Around mid-March, when the local temperature reached 6 ~ 8 ℃, the root activity of the grape started. At this moment, if there was a wound on the grape vine, the sap would flow out from the wound, resulting in “wound flow.” Injury flow more adverse to the growth of grapes, if not controlled, will make a lot of loss of grape sap, nutrient loss led to weakness,